function addLoadEvent(func){
	var oldonload = window.onload;
	if (typeof window.onload != 'function') {
		window.onload = func;
	} else {
		window.onload = function(){
			oldonload();
			func();
		}
	}
}
function addBtn() {
	if(!document.getElementById('adlist')) return;
	var picList = document.getElementById('adlist').getElementsByTagName('img');
	if(picList.length==0) return;
	var btnBox = document.createElement('div');
	btnBox.setAttribute('id','banner_btn');
	var SpanBox ='';
	for(var i=1; i<=picList.length; i++ ) {
		title = picList[i-1].alt;
		var spanList = '<span class="normal" title=' + title + '>'+i+'</span>';		
		SpanBox += spanList;
	}
	btnBox.innerHTML = SpanBox;
	document.getElementById('ad').appendChild(btnBox);
	document.getElementById('banner_btn').getElementsByTagName('span')[0].className = 'current';
	var picList = document.getElementById('adlist').getElementsByTagName('a');
	for (var m=0; m<picList.length; m++){
		var attributeValue = 'picLi_'+m
		picList[m].setAttribute('id',attributeValue);
	}
}

function classNormal(){
	var btnList = document.getElementById('banner_btn').getElementsByTagName('span');
	for (var i=0; i<btnList.length; i++){
		btnList[i].className='normal';
	}
}

function picNormal() {
	var picList = document.getElementById('adlist').getElementsByTagName('a');
	for (var i=0; i<picList.length; i++){
		picList[i].filters?(picList[i].filters[0].opacity= '0'):(picList[i].style.opacity='0');
		picList[i].style.zIndex='0';
	}
}

var timer;
function downOpacity(prevNum, nextID, delay) {
	clearInterval(timer);
	var picList = document.getElementById('adlist').getElementsByTagName('a');
	picList[nextID].filters?(picList[nextID].filters[0].opacity= '100'):(picList[nextID].style.opacity='1');
	picList[nextID].style.zIndex='2';
	picList[prevNum].filters?(picList[prevNum].filters[0].opacity= '100'):(picList[prevNum].style.opacity='1');
	picList[prevNum].style.zIndex='1';
	var elem= document.getElementById('picLi_'+prevNum);
	var o= 9;
	timer= setInterval(function(){
		if(elem.filters) { elem.filters[0].opacity= o*10;} else {elem.style.opacity = o/10; }
		o-= 1;
		if ( o< 0 ) clearInterval(timer);
	},delay);
}

function iBanner() {
	if(!document.getElementById('adlist')||!document.getElementById('banner_btn')) return;
	var btnList = document.getElementById('banner_btn').getElementsByTagName('span');
	var picList = document.getElementById('adlist').getElementsByTagName('a');
	if (picList.length==1) return;
	for (var m=0; m<btnList.length; m++){
		btnList[m].onmouseover = function() {
			for(var n=0; n<btnList.length; n++) {
				if (btnList[n].className == 'current') {
					var prevNum = n;
				}
			}
			var nextNum = this.childNodes[0].nodeValue-1;
			if(nextNum!=prevNum) {
				classNormal();
				this.className='current';
				picNormal();
				downOpacity(prevNum, nextNum, 30);
			}
		}
	}	
}

function autoBanner() {	
	if(!document.getElementById('adlist')||!document.getElementById('banner_btn')) return;
	var autoKey= false;
	document.getElementById('banner_btn').onmouseover = function(){autoKey = true};
	document.getElementById('banner_btn').onmouseout = function(){autoKey = false};
	var btnList = document.getElementById('banner_btn').getElementsByTagName('span');
	var picList = document.getElementById('adlist').getElementsByTagName('a');	
	if(picList.length==1) return ;
	setInterval(function(){
		if(autoKey) return;
		for(var i=0; i<btnList.length; i++) {
			if (btnList[i].className == 'current') {
				var prevNum = i;
			}
		}
		if (prevNum==(picList.length-1) ){
			classNormal();
			btnList[0].className='current';
			picNormal();
			downOpacity(prevNum, 0, 30);
		}else {
			classNormal();
			btnList[prevNum+1].className='current';
			picNormal();
			downOpacity(prevNum, prevNum+1, 30);
		}
	},5000);
}

function NewsPlayer()
{
	var NewsList = document.getElementById('m1').getElementsByTagName('a');		
	setInterval(function(){	
		ActiveID = 0;			
		for(NewsId=0;NewsId < NewsList.length;NewsId++){
			if('newsshow' == NewsList[NewsId].className){ NewsList[NewsId].className = "newshide"; ActiveID = NewsId ; break;}			
		}			
		ActiveID = ( ActiveID + 1 ) >= NewsList.length ? 0 : ++ ActiveID;	//新闻ID循环	
		NewsList[ActiveID].className = "newsshow";
	},5000);
}

addLoadEvent(addBtn);
addLoadEvent(iBanner);
addLoadEvent(autoBanner);
addLoadEvent(NewsPlayer);